SOLUTION: slope of a roof. What is the slope of a 7 in 12 roof? How much does the roof rise in 15 horizontal feet? My book says the answers are .58 and 8.75. I got the .58 and can't understa

Algebra ->  Linear-equations -> SOLUTION: slope of a roof. What is the slope of a 7 in 12 roof? How much does the roof rise in 15 horizontal feet? My book says the answers are .58 and 8.75. I got the .58 and can't understa      Log On


   

Question 605953: slope of a roof. What is the slope of a 7 in 12 roof? How much does the roof rise in 15 horizontal feet? My book says the answers are .58 and 8.75. I got the .58 and can't understand how to get the 8.75.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
they give you the pitch (slope)

7 / 12 = x / 15

105 = 12x